Pipe-coil



Patented Apr. 6, 1920.

2 SHEETS-SHEET I.

d l M E. A. RUSSELL.

PPPPPPPP I APPLICATION FILED JUNE I 1918- 1,335,799. Patented Apr. 6, 1920.

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EDWARD A. RUSSELL, OF CHICAGO, ILLINOIS, ASSIGNOR T0 VAPOR CAR HEATING COMPANY, INC., OF CHICAGO, ILLINOIS, A CORPORATION OF NEW YORK.

PIPE-COIL.

Specification of Letters Patent.

Patented Apr. 6, 192 0.

Application filed June 1, 1918. Serial No. 237,682. 7

T0 all-whom it may concern:

Be it known that I, EDWARD A. RUssELL, a citizen of the United States, residing at Chicago, in the county of of Illinois, have invented certain new and useful Improvements in Pipe Coils, of which the following is a specification.

My invention'relates to a pipe coil, and more particularly to a coil, consisting of a plurality of pipes connected at their adjacent ends by a manifold fitting and intended for use under conditions in which the pipes are liable to unequal expansion and contraction, as is the case with the radiating coils used in-railway car heating systems. In the ordinary railway car steam heating system the radiating coil extends the entire length of the car, or for a considerable portion of it at least, so that when steam is turned on some little time may elapse before the steam is brought'into contact withv all of the pipes of the coil. At the start the coil contains air and sometimes water of condensation which have to be forced through the coil ahead of the steam so that the progress of the steam is relatively slow. Moreover, the pipe or pipes with which the steam first comes into contact are likely to be hotter at all times when steam is on than those adjacent the outlet end of the coil, inasmuch as there is, of course, a gradual condensation of the steam as it progresses through the coil. Conditions such as these give rise necessarily to unequal expansion and contraction of different parts of the coil which, particularly if the coil is a long one, have a tendency to break the pipes or their fittings and con nections, and particularly the manifold fittings at the ends of the coil.

The primary object of my invention is to provide certain novel arrangements and constructions in a coil of the type men.- tioned whereby the connection between the pipes and manifold has a certain flexibility Y which permits unequal expansion and contraction of the pipes Without injury to any part of the coil. 7

A further incidental object is to so construct and arrange the devices by which this flexibility is obtained that these parts may be readily assembled and disassembled.

The invention is illustrated, in a pre- Cook and sea-e ferred embodiment,

drawings wherein:

. Figure 1 is a fragmentary view, in perspective, of the interior of a railway car equipped with a radiating coil constructed in accordance with my invention.

' Fig. 2is a vertical sectional view through the end of the coil shown in Fig. 1. I

Fig. 3 is a sectional View on line 3-3 of Fig. 2; and

V Fig. 4 is a sectional plan on line H of Fig. 2. I a I I Like characters of reference designate like parts in the several figures of the draw mgs.

- Referring to the drawings, the coil shown in the I accompanying in this embodiment consists of four pipes 10, 11, 12 and13. The steam enters the coil through pipe 10, flows therethrough to the left hand end of the coil, and then to the other end of the car through pipes 11 and 12. Pipe 13, which, it will be understood, is connected with pipes 11 and 12 by any suitable manifold for example a manifold like the one to bedescribed at the other end of the coil, provides a conduit for the outflow of the water of condensation.

A manifold 14 is provided for connecting the pipes at the left hand end of the coil. This manifold is formed with a threaded opening 15 into which isscrewed the threaded end 16 of one of the pipes, for example, pipe 11. One or preferably both of the pipes 10 and 12 are slidably connected by certain devices which constitute expansion joints between the pipes and the manifold. These joints are preferably alike for both pipes so that it will be sufiicient to describe that employed in connection with pipe 10. On the threaded end 17 of pipe 10 is screwed a nipple 18 which extends through an externally threaded boss 19 on the manifold. This boss has an internal circumferential shoulder 20 against which the nipple bears and against this shoulder is arranged a packing21 held in place by a follower sleeve 22 and a cap nut 23 which isscrewed upon the boss 19. V

When the steam is turned on the coil pipe 10 will necessarily expand considerably before the other pipes of the coil are affected by the steam. The sliding engagement between the pipe and the manifold permits this expansion without putting any strain on the manifold or the other parts of the coil. The manifold is held to the pipe 11 by a rigid attachment so that it cannot move when the pipe 10 expands or contracts. Any unequal expansion as between pipes 11 and 12 is taken care of by providing pipe 12 with an expansion joint similar to that furnished pipe 10.

I claim:

1.. In combination with a railway car, a heating coil which extends lengthwise of the car and comprises an inlet pipe anchored to the car at its inlet end, a return pipe, and a header at the outer ends of said pipes with which one of said pipes has a sliding connec tion and which is rigidly connected with and supported upon the other pipe, said header being otherwise free from any rigid connection so as to be freely movable with the pipe to which it is rigidly connected when this pipe expands and contracts.

'2. In combination with a railway car, a heating coil arranged in the car and comprising an inlet pipe, a return pipe, and a headerwith which the inlet pipe is slidably connected and which is rigidly connected with and supported on the return pipe, said header being otherwise free from any rigid connection so that it is movable with said return pipe, when this pipe expands and con- 7 slidably connected and which is rigidly connected with and supported on the other pipe so as to be freely movable when the latter expands and contracts.

4:. In combination with a railway car, a heating coil arranged in the car comprising a plurality of circulating pipes in parallel arrangement, a supply pipe connected with one of said pipes and a discharge pipe connected with another of said pipes, said supply and discharge pipes being anchored to the car at points intermediate the ends of the coil, and a header associated with and supported by said parallel pipes, one of said parallel pipes consisting of pipe sections having telescopic relation with each other, for the purpose described, and another of said parallel pipes consisting of a single rigid structure fixed to the header.

EDWARD A. RUSSELL. 

